Stability of High Pressure Turbine Under Partial Admission Condition
Stability of High Pressure Turbine Under Partial Admission Condition
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DOI：
10.1115/detc2005-84774
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
H. Kanki;Akinori Tanitsuji
中科院分区：
文献类型：
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作者：
H. Kanki;Akinori Tanitsuji
高压涡轮机的次同步振动是提高电站运行可靠性的难题之一。为了防止大容量涡轮机的低频振动，人们做了大量的工作，并实际解决了大部分问题[1][2]。今后，必须建立在高温高压蒸汽条件下运行的新型涡轮机的理论设计方法。为了设计这样先进的涡轮机，必须解决部分进汽对涡轮机调节级的影响。本文介绍了从蒸汽涡轮机缩尺模型试验结果和考虑部分进汽工况的阿尔福德力理论分析来解决这一问题。(1)在缩尺模型试验中再现了次同步振动。(2)在总流量相同的情况下，部分进汽比全进汽的失稳力更大。(3)部分进汽时转子轴心相对进汽弧相位的初始位置对转子系统的稳定性有一定的影响。(4)考虑部分进气条件的失稳力理论分析对缩尺模型试验结果进行了定性描述。
Subsynchronous vibration of high-pressure steam turbine is one of the difficult problems to improve the reliability of power plant. Extensive work has been done to prevent the low frequency vibration of high-capacity steam turbine and most of the problems were practically solved[1][2]. In the future, we must build up theoretical approach to design a new turbine operating under the steam condition of high-temperature and high-pressure. To design such an advanced steam turbine, it is necessary to solve the effect of partial admission on control stage of the steam turbine. This paper describes the experimental results from the scale model of the steam turbine and theoretical analysis of Alford force considered partial admission condition to solve the problem. (1) Subsynchronous vibration was reproduced in the scale model test. (2) Partial admission gave larger destabilizing force compared with full admission condition for same total flow rate. (3) Initial position of shaft center to the phase of admission arc on the partial admission had some effect on the stability of the rotor system. (4) Theoretical analysis of destabilizing force considered partial admission condition gave qualitative description of the experimental results from the scale model.Copyright © 2005 by ASME